@Named + @RequestScoped在JBoss 7.1.1的JSF 2.0中不起作用

Question

我有一个工作@ManagedBean,我想用@Named + @RequestScoped豆替代.

// Before
@ManagedBean
public class Login {
   ...
}

// After
import javax.enterprise.context.RequestScoped;
@Named
@RequestScoped
public class Login {
   ...
}

只要我使用,一切都很好@ManagedBean.@Named没有@RequestScoped工作,但为每个EL表达式创建一个新实例.@Named + @RequestScoped但是会产生异常:当请求缓存不活动时,无法添加请求范围的缓存项

java.lang.IllegalStateException: Unable to add request scoped cache item when request cache is not active
    at org.jboss.weld.context.cache.RequestScopedBeanCache.addItem(RequestScopedBeanCache.java:51)
    at de.prosis.dafe.presentation.Login$Proxy$_$$_WeldClientProxy.getUsername(Login$Proxy$_$$_WeldClientProxy.java)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at javax.el.BeanELResolver.getValue(BeanELResolver.java:302)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at org.apache.el.parser.AstValue.getValue(AstValue.java:169)
    at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
    ...

空beans.xml确实存在.是否有任何我不知道的陷阱或错误？我打赌我错过了一些东西,但它确实看起来像一个bug.我搜索了异常消息,但除了引发它的类的源代码之外没有找到任何东西.提前致谢!

更新: 它与我省略的代码有关.登录bean尝试在其构造函数中使会话无效,如果它是一个命名bean(不总是,如果我垃圾邮件F5,它似乎在几次后工作)就会失败并且作为托管bean工作.有人可以解释一下这种行为吗？

public Login() {
            HttpSession session = (HttpSession) FacesContext.getCurrentInstance().getExternalContext().getSession(false);
            if (session != null) {
                session.invalidate();
            }
} 

代码来自该教程:http: //www.greenkode.com/2011/09/user-authentication-and-authorization-using-jaas-and-servlet-3-0-login/

Answer 1

通过删除构造函数中会话的失效来修复它。我仍然不知道为什么 @ManagedBean 有效而 @Named 无效。